Karl aug



, (No Model.) A K. A. JOHANSSON. AUTOMATICALLY COMPENSATING-JOURNAL BQX.

No. 446,384. Patented Feb; 10, 1891.

ww ww J/M W W/w UNITED STATES PATENT (OFFICE.

KARL AUG. JOIIANSSON, OF CHICAGO, ILLINOIS, ASSIGN OR OF ONE-HALF TOEDWARD I-l. \VACHS, OF SAME PLACE.

AUTOMATICALLY-COMPENSATING JOURNAL-BOX.

SPECIFICATION formingpart of Letters Patent No. 446,384, dated February10, 1891.

Application filed November 24, 1890.- Serial No. 372,479. (No model.)

To all whom, it may concern:

Be itknown thatLKARL AUG. JoHANssoN, a citizen of the United States ofAmerica, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inAutomatically- Compensating J ournal-Boxes, of which the following is aspecification, reference being had therein to the accompanying drawings.This my invention relates to journal-boxes of the kind in whichalternately the bearingstrain is brought against opposite sides or ends,such as in boxes of pitmen and in main 7 pillow-blocks for crank-shaftsof engines, &c., and in these boxes it is very important that with theleast friction all lost motion be obviated, as otherwise with thereciprocating force or power exerted a jerking movement destructive toall machinery will be the consequence; and it is the object of this myinvention to provide a device that automatically will take up alllateral movements and thereby compensate for any wear of the boxes; andwith that object in view my in- 2 5 vention principally consists of twodisks having helical faces that are placed in contact in a manner that arotating movement of the two disks in opposite directions will diminishor increase their total width and in a spiral spring inserted betweenthese disks and so connected with its ends to the adjoining disks toexert its force in a direction to increase the total width occupied bythese disks, such disks so constructed being placed in the jour- 3 5nal-bearing or pillow-block behind a movable brass or journal box, allas will be more fully hereinafter described, and specifically claimed.

In the accompanying drawings, Figure 1 represents an elevation of apitman-head having my improved device, and Fig. 2 is a longitudinalsection through the center of the same. Fig. 3 is abottom or helicalface view of the upper expansion-disk; Fig. 4, a side elevation of thespiral spring detached; and Figs. 5 and 6 are elevations of other partsdetached.

Corresponding letters of reference in the several figures of thedrawings designate like parts.

A denotes the pitman-head providing a rectangular opening, into whichthebrasses l3 and C are fitted, which are bored each to form a semi-bearing for the crank-pin or cross-head pin of an engine. The brass B isfitted to be rigid in the pitman-head, while the brass C can slidelongitudinally in such head. Vith its lower or square end this brace Crests upon a plate D, having rectangular end flanges d, which are snuglyfitted between the side faces of the head-opening also to slidelongitudinally therein, and against the bottom face of such head-openingis fitted a rectangular plate E.

Two disks F and G are fitted to have heli- 63 cal faces somewhat likethe faces of a coupling-clutch, which when brought together will snuglyfit upon each other, while their exterior faces are square to theircylindrical periphery, and the disk G has to its outer or under face aprojecting central boss g, that enters a central hole of plate E. Thedisk F has a central downwardly-projecting pin f, that enters a centralhole in disk G'for holding both disks on relative concentric positions,and around this pin f both disks have annular recesses providing achamber for a spiral-spring H, surrounding pin f, and havingright-angularly bent ends inserted into any one of a series of socketsdrilled into the bottoms of the annular recesses of both disks F and G,so as to enable the placing of the spring II on any desired tension forrotating the disks in such opposite directions for the helix shoulders hto turn away from each other, and thereby to increase the total width ofboth disks, whereby such disks will push and hold the brass C up to itsbearing against the pin or shaft, compensating for all slack movement orlost motion that might be brought 9 about by frictional wear of thecontacting surfaces in motion.

The disks F and G have drilled in their circumferential surface each aseries of radial socketst' for inserting small levers of wire, by whichthe said disks may be turned to contract the spring and therebydecreasing v the total width of both disks combined; and

the parts D, F, Gr, and E placed together with the spring thuscontracted can be in- 10 s'ertedinto position. and then securely held inposition rby a plate I, secured against oneside, and strips of metal J,secured against the opposite sides of plate D by screws J, tapped intothe right-angular flanges of plate D.

As will be readily seen, this device can be applied not only topitman-heads,but also to pillow-blocks, and is reliable for making theirbearings self-adj usting Without any possibility of getting out oforder.

\Vhat I claim is- 1. The combination, with a sliding brass or bearing,of .disks F and G, having helical meeting faces, and a spring H forrotating such disks in opposite directions, tending .to increase theirjoint width, substantially as set forth.

2. Thecombination, with the-solid frame-of thekind specified and withone rigid andone movable brass or bearing fitted therein, of disks F.and G, inserted behind the movable brass or bearing and having helicalmeeting faces, and a spring inserted in a'central recess between suchdisks, exerting its force f and having helical meeting faces, springH,'inserted in recesses between such disks, andplate I and-strips J,secured against the sides of plate D, all constructed and arrangedsubstantially as described, .to operate as specified.

In testimony WhBIBOfILffi-X mysignat'ure in presence of two witnesses.

KARL AUG. J'OHANSSON. WVitnesses:

WILLIAM H. Lorz, OTTO LUEBKERT.

